Physics Questions

Q:

Which of the following changes when a body performs uniform circular motion?

A) Mass B) Momentum
C) Speed D) Direction
 
Answer & Explanation Answer: D) Direction

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Q:

AC is converted into DC by a

A) Condenser B) Rectifier
C) Amplifier D) Filter
 
Answer & Explanation Answer: B) Rectifier

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Q:

1 pascal equals 1 ________________.

A) N m2 B) N m-2
C) N m D) N m-1
 
Answer & Explanation Answer: B) N m-2

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Q:

In which of the following mentioned activities is the potential energy (P.E) converted into kinetic energy(K.E)?

A) The explosion of a fire cracker B) The switching on of a torch
C) The switching off of a torch D) The swinging of a pendulum
 
Answer & Explanation Answer: D) The swinging of a pendulum

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Q:

The centre of the reflecting surface of a spherical mirror is a point called the ___.

A) pole B) focus
C) radius D) aperature
 
Answer & Explanation Answer: A) pole

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Q:

What is the reason for formation of Mirage in desert?

A) Refraction of light B) Reflection of light
C) Total internal reflection of light D) Both Refraction and Total internal reflection of light
 
Answer & Explanation Answer: D) Both Refraction and Total internal reflection of light

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Q:

Which of the following can neither be created nor be destroyed?

A) Velocity B) Power
C) Energy D) Momentum
 
Answer & Explanation Answer: C) Energy

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Q:

A 5 kg object is raised through a height of 4 m. The work done by the force of gravity acting on the object is (take g = 10 m/s2)

 

A) 200j B) 20j
C) -20j D) -200j
 
Answer & Explanation Answer: D) -200j

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0 901